(19)
(11) EP 1 712 815 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.05.2010 Bulletin 2010/20

(43) Date of publication A2:
18.10.2006 Bulletin 2006/42

(21) Application number: 06007895.3

(22) Date of filing: 13.04.2006
(51) International Patent Classification (IPC): 
F16H 61/66(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK YU

(30) Priority: 14.04.2005 JP 2005117065

(71) Applicant: MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
Tokyo 108-8410 (JP)

(72) Inventors:
  • Suzuki, Yuji
    Minato-ku Tokyo 108-8410 (JP)
  • Ohta, Takashi
    Minato-ku Tokyo 108-8410 (JP)
  • Hanai, Yosuke
    Minato-ku Tokyo 108-8410 (JP)
  • Izumi, Hiroshi
    Minato-ku Tokyo 108-8410 (JP)

(74) Representative: Vossius & Partner 
Siebertstraße 4
81675 München
81675 München (DE)

   


(54) Controller for continuously variable transmission


(57) A controller for a continuously variable transmission (CVT: 12) mounted in a vehicle (10). The controller includes a first setting unit (32) for setting a basic speed ratio of the CVT (12) ; a second setting unit (34) for setting an adjustment speed ratio of the CVT (12); and a control unit (37) for controlling the CVT (12) based on the basic speed ratio and adjustment speed ratio. The second setting unit (34) includes an increasing unit (35) for progressively increasing the adjustment speed ratio according to a decrease in a target torque interrelated value in a first operating area (L2), and a decreasing unit (35) for progressively decreasing the adjustment speed ratio according to a decrease in the target torque interrelated value in a second operating area (L4). Between the first operating area (L2) and the second operating area (L4), the second setting unit (34) maintains the adjustment speed ratio that is set finally.







Search report